Lots more going on in the rear of that car than some toe change. In a stock rear suspension geometry, the anti-squat plays more of a part than almost anything. Set toe in slightly like normal - will put you in the right place.

The only time we have messed with exotic toe settings was combined with Motorsport geometry where we could get rid of a bit of the anti and move the toe link point to induce rear steer, which made the toe in under braking, out (or straight) under squat, and steered the car with roll.